Nut-machine



UNITED STATES PATENT OiEErcEaj..

GEORGE DUNHAM, OF UNIONVILLE, VCONNECTIGT.

-NUT-MACHI'N E.

Specification forming part ot' Letters Patent No. 48,383, dated June 27, 1865.

' and represented in the following specification and drawings; and to enable others skilled in the art to make and use the same, I will proceed to describe its construction and operation by referring to the drawings, in which the same letters indicate like parts in each of the gures, the nature of which consists in the peculiar construction and operation of the'mechanism, whereby I am enabled to size 0r gage the bar, cut the blank therefrom, and bezel its corners, swage its edges, punch the hole, and Hatten the face without the use of a formingpin,77 so that the nut will be completed while the metal ,is yet in a heated condition: first, gagiug, cutting, and bezeling the corners ot the blank; second, swaging'the edges to form it into proper shape; third, punching the hole 0r eye of the nut and discharging it from the machine. Thus, after the machine is set in motion and three blanks have been cut from the bar andeach blank is passing through a sepa` rate and distinct operation, each revolution of the driving-shaft will cut a blank from the bar and discharge a nut from themachine.

In the accompanying drawings, Figure l shows afront elevation. Fig. 2 shows a lefthand end elevation. Fig. 3 shows aright-hand end elevation. Fig. 4 shows a back-side elevation, and Fig. 5 shows a top-plan view of the bed-plate after the posts or framework is broken off or removed with the mechanism attached thereto.

A is the bed-plate.

B are the legs or foundation, which support the whole machine.

G are the posts or frame-work made or secured onto the bed-plate, to which the mechanism above the bed-plate is arranged vand secured.

All of the parts employed which constitute the frame-work ot' this machine are designed to be made of metal proportionate in size and strength to the work which it is designed to is applied to the machine.

F are gears, which are separately designated by gures l 2 3, Snc., which connect and transmitinotion from one tothe other of the shafts.

G are studs, posts, or hangers elevated above or hanging below from the bed-plate, to provide bearin gs or guides for the sliding, revolving, or vibrating parts of the mechanism.

H are cams,each of which are separately designated by Figs. l 2 3, 8vo. Those marked H, H', and H2 are arranged upon the shaft D. (See Fig. 1.) H8 H5 H6 H7 are arranged upon the shaft D'. (See Fig. 4.-) H3 and H4 are arranged on the shaft D2. (See Fig. 3.)

I is an arm or lever, one end of which is secured to the upper end 0f the stud G', and the other end is connected to the punch-bar Mby means of arms a a. The cam H2 acts upon the upper end of the punchbar M to force the punch, in the lower end thereof, through the blank c directly under the clearerbar N, and the cam H reacts upon the arm or lever I to draw the punch from the nut after it (the hole in the nut) has been punched, and while the nut is being held firmly in its place by means ot' the spring-opening in the under side of the Vclearer-bar N while the punch is drawn there` from.

In Fig. 6 the punch-bar M is shown with-a removable cap, M. Between this cap and punch-bar is formed a square thread screwsocket, i, to receive the screw 7c formed on the upper end of the punch, and to hold the body ot'- the punch a firmly between the plate-surfaces of the screw-thread. By the use of this arrangement Iamenabled to raise or lower the punch by turning it any desirable distance at a time as it is ground oli from time to time by simply loosening the screws in .the front plate, M.

J are anvil-bloc is having passages or openings in the under side to allow the nuts to pass through, and for the conveyers to work in.

Lis a shear-bar, secured to the sliding barL, that works in ways formed in the front of the studs or posts G.

L' is a plate, secured in an adjustable manner on the bed-plate in front of and adj-usted closely to the face side of the shear-bar L,which two, L and L', form the shears for cutting the blank `for a nut from the bar just after it has been sized in the gage-press.

O is the gage-press, operated by an incline plane or wedge, d, having an arm, g, extending back so as to be moved in a given direction to force up the press-plate o, to size the bar, placed between it and the back side of the anvil-block J, by means of an arm, e, attached to the shaft D.

K are swing swage-hammers for finishing up the nuts. The arms of said hammers K and K2 are attached to the hanging stud G7, and the arm of the hammer K2 is hung to the stock G2, all of which are lifted or drawn back in readiness to impart a blow by the cams H3 Il H6, by the action, respectively, of their springs or their equivalent motive incentives.

P is a spring or yielding table, onto which the blank drops or rests as itis cut from the bar, the bed of which (the table) is arranged nearly in the center ofa cone-shape recess, so that as the shear-bar L cuts the blank from the bar it also continues its motion and presses thc blank held between it and the yielding table-bed, down into the cone-shape recess Q, thereby forming a bezel on the four corners of the face of the nut. The sliding bar L, on which the shear-barL is arranged, is operated downward by the action of the cam H until the blank is cut and pressed, then it recedes a short distance, and remainsin that position long enough toallow the blank to be pushed forward by the spring-follower to a point directly under and within the angle or shape of the anvil, and allows the follower R to return to its restingplace, by the action of a spring or its equivalent, ready to push the next blank forward. Then the cam allows it to rise or recede still more, and remain in that position until the bar is slid forward between the side of the anvil J and the gage or press O against a gage-block, when the gaging, cutting, and beveling' motion is repeated as before. Said blank (now in the angle or shape of the anvil) rests between two spindle-holders, S, the'upper one of which,when depressed, fills loosely its bearings; but when lifted, it (the spindle) being made smaller just below its lower bearings allows it to play sidewise more or less without striking the bearings, thus avoiding theinjurious effect which otherwise might occurfroin the blows of the hammers. The blank thus h'eld between the holders is lifted upward directly against the face of the anvil by means of an angular lever, T, which is hung nearly in the center to the stud G7, one end of which extends forward so as to lift the holder S, which is effected by the action of the cam H5 upon the rear end of said lever that extends back and up through the bed-plate. The blank while in this position receives two blows from each of the hainmers K3 and K. The holders still having the blank drop (by the action of springs or their equivalents) to their starting-point, when the spring push-bar a, by the action of the cam H7, moves the blank forward into an opening formed in the under side of the clearerbar N directly under the punch, when the punch, by the action of the cam H2, descends and makes the hole in the blank, and is in turn lifted from said blank by the joint action of the arm I and cam Hf, when the clearer-bar, by the action of the cam H4, draws the nut forwardin frontofthe hammerK2, when thespring push-bar u moves the nut from the springopening in the clearer-bar back directly under the hammer K2, which, by the action of the cam H8, causes the finishing blow to be given to the face ofthenut, which then drops from the machine through an opening formed in the bedplate ofthe machinejust back of the hammer 'K Thus, as before stated, two nuts are continually in the process of being made and tinished after the third blank has been cut from the bar.

I believe I have thus shown and described the important characteristics of this my improvement so as to enable a person skilled to make and use the same therefrom, and that the utility and advantage to be derived therefrom must be apparent to the mind of a practical mechanic.

What I claim, therefore, as of my own invention,.and desire to secure by Letters Patent, 1s-

1. The sliding plate o, operated by the plate d, with its inclined edges for gaging the width of the bar just before the blank is cut therefrom, substantially as described.

2. The,y combination of the conical-shape recess Q, with the spring or yielding table P, substantially as and for the purpose described.

3. The employment ofthe lifting holders S S', substantially in the manner and for the purpose described.

4. The clearer-bar N, for holding, clearing, and carrying the nut from one point to another, substantially as described'.

l 5. Forming a screw upon the upper end of the punch k, in combination with the threaded socket i, substantially as described. GEORGE DUNHAM. Witnesses:

E. W. BLIss, JEREMY W. BLrss. 

